A District of Columbia police offer has been assigned to administrative duty after allegedly remarking that he’d shoot First Lady Michelle Obama. The unnamed officer was previously assigned as a motorcycle escort for White House officials, but has since been removed from his post and is under investigation by District police and the Secret Service.

The threat against Mrs. Obama allegedly came Wednesday as officers from the Special Operations Division were discussing threats against the Obamas.

It was not immediately clear where the alleged conversation took place or exactly how many officers took part in the conversation.

During that conversation, the officials said, the officer allegedly said he would shoot the First Lady and then used his phone to retrieve a picture of the firearm he said he would use. It was not immediately clear what type of firearm was allegedly shown.

An officer overheard the alleged threat and reported it to a police lieutenant at the Division, who immediately notified superiors, the officials said.

“We received an allegation that inappropriate comments were made. We are currently investigating the nature of those comments,” D.C. police spokeswoman Gwendolyn Crump said in an email. She declined to discuss the matter further.

Although there doesn’t seem to be an immediate threat to Mrs. Obama’s safety, D.C. Mayor Vincent Gray told reporters he hoped the allegations weren’t true. To be on the safe side, however, officials across several agencies are investigating the officer’s alleged comments.